def tx_for_tx_hash(self, tx_hash):
"""
Get a Tx by its hash.
"""
url = "%s/rawtx/%s" % (self.url, b2h_rev(tx_hash))
d = urlopen(url).read()
j = json.loads(d.decode("utf8"))
tx = Tx.from_hex(j.get("rawtx", ""))
if tx.hash() == tx_hash:
return tx
def tx_for_tx_hash(self, tx_hash):
"""
Get a Tx by its hash.
"""
url = "%s/rawtx/%s" % (self.url, b2h_rev(tx_hash))
d = urlopen(url).read()
j = json.loads(d.decode("utf8"))
tx = Tx.from_hex(j.get("rawtx", ""))
if tx.hash() == tx_hash:
return tx
def tx_for_tx_hash(self, tx_hash):
raw_tx = self.connection.getrawtransaction(b2h_rev(tx_hash))
tx = Tx.from_hex(raw_tx)
return tx
def tx_for_tx_hash(self, tx_hash):
"Get a Tx by its hash."
URL = "https://blockchain.info/rawtx/%s?format=hex" % b2h_rev(tx_hash)
tx = Tx.from_hex(urlopen(URL).read().decode("utf8"))
return tx
def tx_for_tx_hash(self, tx_hash):
"Get a Tx by its hash."
URL = self.api_domain + ("/rawtx/%s?format=hex" % b2h_rev(tx_hash))
tx = Tx.from_hex(urlopen(URL).read().decode("utf8"))
return tx
def tx_for_tx_hash(self, tx_hash):
"Get a Tx by its hash."
URL = self.api_domain + ("/rawtx/%s?format=hex" % b2h_rev(tx_hash))
tx = Tx.from_hex(urlopen(URL).read().decode("utf8"))
return tx
def tx_for_tx_hash(self, tx_hash):
raw_tx = self.connection.getrawtransaction(b2h_rev(tx_hash))
tx = Tx.from_hex(raw_tx)
return tx
def build_psbt(ctx, xfp, addrs, pubkey=None, xpubs=None, redeem=None):
locals().update(ctx.obj)
payout_address = ctx.obj['payout_address']
out_psbt = ctx.obj['output_psbt']
if pubkey:
assert len(addrs) == 1 # can only be single addr in that case
assert len(pubkey) == 33
spending = []
total = 0
psbt = BasicPSBT()
for path, addr in addrs:
print(f"addr: {path} => {addr} ... ", end='')
rr = explora('address', addr, 'utxo')
if not rr:
print('nada')
continue
here = 0
for u in rr:
here += u['value']
tt = TxIn(h2b_rev(u['txid']), u['vout'])
spending.append(tt)
#print(rr)
pin = BasicPSBTInput(idx=len(psbt.inputs))
psbt.inputs.append(pin)
pubkey = pubkey or calc_pubkey(xpubs, path)
pin.bip32_paths[pubkey] = str2path(xfp, path)
# fetch the UTXO for witness signging
td = explora('tx', u['txid'], 'hex', is_json=False)
#print(f"txis {u['txid']}:\b{td!r}")
outpt = Tx.from_hex(td.decode('ascii')).txs_out[u['vout']]
with BytesIO() as b:
outpt.stream(b)
pin.witness_utxo = b.getvalue()
if redeem:
pin.redeem_script = redeem
print('%.8f BTC' % (here / 1E8))
total += here
if len(spending) > 15:
print("Reached practical limit on # of inputs. "
"You'll need to repeat this process again later.")
break
assert total, "Sorry! Didn't find any UTXO"
print("Found total: %.8f BTC" % (total / 1E8))
if payout_address:
print("Planning to send to: %s" % payout_address)
dest_scr = BTC.contract.for_address(payout_address)
txn = Tx(2, spending, [TxOut(total, dest_scr)])
else:
print("Output section of PSBT will be empty. Change downstream")
txn = Tx(2, spending, [])
fee = tx_fee.recommended_fee_for_tx(txn)
# placeholder, single output that isn't change
pout = BasicPSBTOutput(idx=0)
psbt.outputs.append(pout)
print("Guestimate fee: %.8f BTC" % (fee / 1E8))
if txn.txs_out:
txn.txs_out[0].coin_value -= fee
# write txn into PSBT
with BytesIO() as b:
txn.stream(b)
psbt.txn = b.getvalue()
out_psbt.write(psbt.as_bytes())
print("PSBT to be signed:\n\n\t" + out_psbt.name, end='\n\n')